[linux-2.6-block.git] / drivers / mfd / da9063-core.c

/*
 * da9063-core.c: Device access for Dialog DA9063 modules
 *
 * Copyright 2012 Dialog Semiconductors Ltd.
 * Copyright 2013 Philipp Zabel, Pengutronix
 *
 * Author: Krystian Garbaciak, Dialog Semiconductor
 * Author: Michal Hajduk, Dialog Semiconductor
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/mutex.h>
#include <linux/mfd/core.h>
#include <linux/regmap.h>

#include <linux/mfd/da9063/core.h>
#include <linux/mfd/da9063/pdata.h>
#include <linux/mfd/da9063/registers.h>

#include <linux/proc_fs.h>
#include <linux/kthread.h>
#include <linux/uaccess.h>


static struct resource da9063_regulators_resources[] = {
	{
		.name	= "LDO_LIM",
		.start	= DA9063_IRQ_LDO_LIM,
		.end	= DA9063_IRQ_LDO_LIM,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct resource da9063_rtc_resources[] = {
	{
		.name	= "ALARM",
		.start	= DA9063_IRQ_ALARM,
		.end	= DA9063_IRQ_ALARM,
		.flags	= IORESOURCE_IRQ,
	},
	{
		.name	= "TICK",
		.start	= DA9063_IRQ_TICK,
		.end	= DA9063_IRQ_TICK,
		.flags	= IORESOURCE_IRQ,
	}
};

static struct resource da9063_onkey_resources[] = {
	{
		.name	= "ONKEY",
		.start	= DA9063_IRQ_ONKEY,
		.end	= DA9063_IRQ_ONKEY,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct resource da9063_hwmon_resources[] = {
	{
		.start	= DA9063_IRQ_ADC_RDY,
		.end	= DA9063_IRQ_ADC_RDY,
		.flags	= IORESOURCE_IRQ,
	},
};


static const struct mfd_cell da9063_common_devs[] = {
	{
		.name		= DA9063_DRVNAME_REGULATORS,
		.num_resources	= ARRAY_SIZE(da9063_regulators_resources),
		.resources	= da9063_regulators_resources,
	},
	{
		.name		= DA9063_DRVNAME_LEDS,
	},
	{
		.name		= DA9063_DRVNAME_WATCHDOG,
		.of_compatible	= "dlg,da9063-watchdog",
	},
	{
		.name		= DA9063_DRVNAME_HWMON,
		.num_resources	= ARRAY_SIZE(da9063_hwmon_resources),
		.resources	= da9063_hwmon_resources,
	},
	{
		.name		= DA9063_DRVNAME_ONKEY,
		.num_resources	= ARRAY_SIZE(da9063_onkey_resources),
		.resources	= da9063_onkey_resources,
		.of_compatible = "dlg,da9063-onkey",
	},
	{
		.name		= DA9063_DRVNAME_VIBRATION,
	},
};

/* Only present on DA9063 , not on DA9063L */
static const struct mfd_cell da9063_devs[] = {
	{
		.name		= DA9063_DRVNAME_RTC,
		.num_resources	= ARRAY_SIZE(da9063_rtc_resources),
		.resources	= da9063_rtc_resources,
		.of_compatible	= "dlg,da9063-rtc",
	},
};

static int da9063_clear_fault_log(struct da9063 *da9063)
{
	int ret = 0;
	int fault_log = 0;

	ret = regmap_read(da9063->regmap, DA9063_REG_FAULT_LOG, &fault_log);
	if (ret < 0) {
		dev_err(da9063->dev, "Cannot read FAULT_LOG.\n");
		return -EIO;
	}

	if (fault_log) {
		if (fault_log & DA9063_TWD_ERROR)
			dev_dbg(da9063->dev,
				"Fault log entry detected: DA9063_TWD_ERROR\n");
		if (fault_log & DA9063_POR)
			dev_dbg(da9063->dev,
				"Fault log entry detected: DA9063_POR\n");
		if (fault_log & DA9063_VDD_FAULT)
			dev_dbg(da9063->dev,
				"Fault log entry detected: DA9063_VDD_FAULT\n");
		if (fault_log & DA9063_VDD_START)
			dev_dbg(da9063->dev,
				"Fault log entry detected: DA9063_VDD_START\n");
		if (fault_log & DA9063_TEMP_CRIT)
			dev_dbg(da9063->dev,
				"Fault log entry detected: DA9063_TEMP_CRIT\n");
		if (fault_log & DA9063_KEY_RESET)
			dev_dbg(da9063->dev,
				"Fault log entry detected: DA9063_KEY_RESET\n");
		if (fault_log & DA9063_NSHUTDOWN)
			dev_dbg(da9063->dev,
				"Fault log entry detected: DA9063_NSHUTDOWN\n");
		if (fault_log & DA9063_WAIT_SHUT)
			dev_dbg(da9063->dev,
				"Fault log entry detected: DA9063_WAIT_SHUT\n");
	}

	ret = regmap_write(da9063->regmap,
			   DA9063_REG_FAULT_LOG,
			   fault_log);
	if (ret < 0)
		dev_err(da9063->dev,
			"Cannot reset FAULT_LOG values %d\n", ret);

	return ret;
}

int da9063_device_init(struct da9063 *da9063, unsigned int irq)
{
	struct da9063_pdata *pdata = da9063->dev->platform_data;
	int model, variant_id, variant_code;
	int ret;

	ret = da9063_clear_fault_log(da9063);
	if (ret < 0)
		dev_err(da9063->dev, "Cannot clear fault log\n");

	if (pdata) {
		da9063->flags = pdata->flags;
		da9063->irq_base = pdata->irq_base;
	} else {
		da9063->flags = 0;
		da9063->irq_base = -1;
	}
	da9063->chip_irq = irq;

	if (pdata && pdata->init != NULL) {
		ret = pdata->init(da9063);
		if (ret != 0) {
			dev_err(da9063->dev,
				"Platform initialization failed.\n");
			return ret;
		}
	}

	ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_ID, &model);
	if (ret < 0) {
		dev_err(da9063->dev, "Cannot read chip model id.\n");
		return -EIO;
	}
	if (model != PMIC_CHIP_ID_DA9063) {
		dev_err(da9063->dev, "Invalid chip model id: 0x%02x\n", model);
		return -ENODEV;
	}

	ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_VARIANT, &variant_id);
	if (ret < 0) {
		dev_err(da9063->dev, "Cannot read chip variant id.\n");
		return -EIO;
	}

	variant_code = variant_id >> DA9063_CHIP_VARIANT_SHIFT;

	dev_info(da9063->dev,
		 "Device detected (chip-ID: 0x%02X, var-ID: 0x%02X)\n",
		 model, variant_id);

	if (variant_code < PMIC_DA9063_BB && variant_code != PMIC_DA9063_AD) {
		dev_err(da9063->dev,
			"Cannot support variant code: 0x%02X\n", variant_code);
		return -ENODEV;
	}

	da9063->variant_code = variant_code;

	ret = da9063_irq_init(da9063);
	if (ret) {
		dev_err(da9063->dev, "Cannot initialize interrupts.\n");
		return ret;
	}

	da9063->irq_base = regmap_irq_chip_get_base(da9063->regmap_irq);

	ret = devm_mfd_add_devices(da9063->dev, PLATFORM_DEVID_NONE,
				   da9063_common_devs,
				   ARRAY_SIZE(da9063_common_devs),
				   NULL, da9063->irq_base, NULL);
	if (ret) {
		dev_err(da9063->dev, "Failed to add child devices\n");
		return ret;
	}

	if (da9063->type == PMIC_TYPE_DA9063) {
		ret = devm_mfd_add_devices(da9063->dev, PLATFORM_DEVID_NONE,
					   da9063_devs, ARRAY_SIZE(da9063_devs),
					   NULL, da9063->irq_base, NULL);
		if (ret) {
			dev_err(da9063->dev, "Failed to add child devices\n");
			return ret;
		}
	}

	return ret;
}

MODULE_DESCRIPTION("PMIC driver for Dialog DA9063");
MODULE_AUTHOR("Krystian Garbaciak");
MODULE_AUTHOR("Michal Hajduk");
MODULE_LICENSE("GPL");
Commit	Line	Data
8e685483 KG	1	/*
	2	* da9063-core.c: Device access for Dialog DA9063 modules
	3	*
	4	* Copyright 2012 Dialog Semiconductors Ltd.
	5	* Copyright 2013 Philipp Zabel, Pengutronix
	6	*
37778d83 ST	7	* Author: Krystian Garbaciak, Dialog Semiconductor
37778d83 ST	8	* Author: Michal Hajduk, Dialog Semiconductor
8e685483 KG	9	*
	10	* This program is free software; you can redistribute it and/or modify it
	11	* under the terms of the GNU General Public License as published by the
	12	* Free Software Foundation; either version 2 of the License, or (at your
	13	* option) any later version.
	14	*
	15	*/
	16
	17	#include <linux/kernel.h>
	18	#include <linux/module.h>
	19	#include <linux/init.h>
	20	#include <linux/slab.h>
	21	#include <linux/device.h>
	22	#include <linux/delay.h>
	23	#include <linux/interrupt.h>
	24	#include <linux/mutex.h>
	25	#include <linux/mfd/core.h>
	26	#include <linux/regmap.h>
	27
	28	#include <linux/mfd/da9063/core.h>
	29	#include <linux/mfd/da9063/pdata.h>
	30	#include <linux/mfd/da9063/registers.h>
	31
	32	#include <linux/proc_fs.h>
	33	#include <linux/kthread.h>
	34	#include <linux/uaccess.h>
	35
	36
a0e08b86 KG	37	static struct resource da9063_regulators_resources[] = {
	38	{
	39	.name = "LDO_LIM",
	40	.start = DA9063_IRQ_LDO_LIM,
	41	.end = DA9063_IRQ_LDO_LIM,
	42	.flags = IORESOURCE_IRQ,
	43	},
	44	};
	45
	46	static struct resource da9063_rtc_resources[] = {
	47	{
	48	.name = "ALARM",
	49	.start = DA9063_IRQ_ALARM,
	50	.end = DA9063_IRQ_ALARM,
	51	.flags = IORESOURCE_IRQ,
	52	},
	53	{
	54	.name = "TICK",
	55	.start = DA9063_IRQ_TICK,
	56	.end = DA9063_IRQ_TICK,
	57	.flags = IORESOURCE_IRQ,
	58	}
	59	};
	60
	61	static struct resource da9063_onkey_resources[] = {
	62	{
9011e4a8	63	.name = "ONKEY",
a0e08b86 KG	64	.start = DA9063_IRQ_ONKEY,
	65	.end = DA9063_IRQ_ONKEY,
	66	.flags = IORESOURCE_IRQ,
	67	},
	68	};
	69
	70	static struct resource da9063_hwmon_resources[] = {
	71	{
	72	.start = DA9063_IRQ_ADC_RDY,
	73	.end = DA9063_IRQ_ADC_RDY,
	74	.flags = IORESOURCE_IRQ,
	75	},
	76	};
	77
	78
c2ffec5e	79	static const struct mfd_cell da9063_common_devs[] = {
8e685483 KG	80	{
8e685483 KG	81	.name = DA9063_DRVNAME_REGULATORS,
a0e08b86 KG	82	.num_resources = ARRAY_SIZE(da9063_regulators_resources),
a0e08b86 KG	83	.resources = da9063_regulators_resources,
8e685483 KG	84	},
	85	{
	86	.name = DA9063_DRVNAME_LEDS,
	87	},
	88	{
	89	.name = DA9063_DRVNAME_WATCHDOG,
71e03de4	90	.of_compatible = "dlg,da9063-watchdog",
8e685483 KG	91	},
	92	{
	93	.name = DA9063_DRVNAME_HWMON,
a0e08b86 KG	94	.num_resources = ARRAY_SIZE(da9063_hwmon_resources),
a0e08b86 KG	95	.resources = da9063_hwmon_resources,
8e685483 KG	96	},
	97	{
	98	.name = DA9063_DRVNAME_ONKEY,
a0e08b86 KG	99	.num_resources = ARRAY_SIZE(da9063_onkey_resources),
a0e08b86 KG	100	.resources = da9063_onkey_resources,
9011e4a8	101	.of_compatible = "dlg,da9063-onkey",
8e685483	102	},
c2ffec5e MV	103	{
	104	.name = DA9063_DRVNAME_VIBRATION,
	105	},
	106	};
	107
	108	/* Only present on DA9063 , not on DA9063L */
	109	static const struct mfd_cell da9063_devs[] = {
8e685483 KG	110	{
8e685483 KG	111	.name = DA9063_DRVNAME_RTC,
a0e08b86 KG	112	.num_resources = ARRAY_SIZE(da9063_rtc_resources),
a0e08b86 KG	113	.resources = da9063_rtc_resources,
71e03de4	114	.of_compatible = "dlg,da9063-rtc",
8e685483	115	},
8e685483 KG	116	};
8e685483 KG	117
9011e4a8 ST	118	static int da9063_clear_fault_log(struct da9063 *da9063)
	119	{
	120	int ret = 0;
	121	int fault_log = 0;
	122
	123	ret = regmap_read(da9063->regmap, DA9063_REG_FAULT_LOG, &fault_log);
	124	if (ret < 0) {
	125	dev_err(da9063->dev, "Cannot read FAULT_LOG.\n");
	126	return -EIO;
	127	}
	128
	129	if (fault_log) {
	130	if (fault_log & DA9063_TWD_ERROR)
	131	dev_dbg(da9063->dev,
	132	"Fault log entry detected: DA9063_TWD_ERROR\n");
	133	if (fault_log & DA9063_POR)
	134	dev_dbg(da9063->dev,
	135	"Fault log entry detected: DA9063_POR\n");
	136	if (fault_log & DA9063_VDD_FAULT)
	137	dev_dbg(da9063->dev,
	138	"Fault log entry detected: DA9063_VDD_FAULT\n");
	139	if (fault_log & DA9063_VDD_START)
	140	dev_dbg(da9063->dev,
	141	"Fault log entry detected: DA9063_VDD_START\n");
	142	if (fault_log & DA9063_TEMP_CRIT)
	143	dev_dbg(da9063->dev,
	144	"Fault log entry detected: DA9063_TEMP_CRIT\n");
	145	if (fault_log & DA9063_KEY_RESET)
	146	dev_dbg(da9063->dev,
	147	"Fault log entry detected: DA9063_KEY_RESET\n");
	148	if (fault_log & DA9063_NSHUTDOWN)
	149	dev_dbg(da9063->dev,
	150	"Fault log entry detected: DA9063_NSHUTDOWN\n");
	151	if (fault_log & DA9063_WAIT_SHUT)
	152	dev_dbg(da9063->dev,
	153	"Fault log entry detected: DA9063_WAIT_SHUT\n");
	154	}
	155
	156	ret = regmap_write(da9063->regmap,
	157	DA9063_REG_FAULT_LOG,
	158	fault_log);
	159	if (ret < 0)
	160	dev_err(da9063->dev,
	161	"Cannot reset FAULT_LOG values %d\n", ret);
	162
	163	return ret;
	164	}
	165
8e685483 KG	166	int da9063_device_init(struct da9063 *da9063, unsigned int irq)
	167	{
	168	struct da9063_pdata *pdata = da9063->dev->platform_data;
c1d12c78	169	int model, variant_id, variant_code;
8e685483 KG	170	int ret;
8e685483 KG	171
9011e4a8 ST	172	ret = da9063_clear_fault_log(da9063);
	173	if (ret < 0)
	174	dev_err(da9063->dev, "Cannot clear fault log\n");
	175
8e685483 KG	176	if (pdata) {
	177	da9063->flags = pdata->flags;
	178	da9063->irq_base = pdata->irq_base;
	179	} else {
	180	da9063->flags = 0;
439b8bdd	181	da9063->irq_base = -1;
8e685483 KG	182	}
	183	da9063->chip_irq = irq;
	184
	185	if (pdata && pdata->init != NULL) {
	186	ret = pdata->init(da9063);
	187	if (ret != 0) {
	188	dev_err(da9063->dev,
	189	"Platform initialization failed.\n");
	190	return ret;
	191	}
	192	}
	193
	194	ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_ID, &model);
	195	if (ret < 0) {
	196	dev_err(da9063->dev, "Cannot read chip model id.\n");
	197	return -EIO;
	198	}
df7878f9	199	if (model != PMIC_CHIP_ID_DA9063) {
8e685483 KG	200	dev_err(da9063->dev, "Invalid chip model id: 0x%02x\n", model);
	201	return -ENODEV;
	202	}
	203
c1d12c78	204	ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_VARIANT, &variant_id);
8e685483	205	if (ret < 0) {
c1d12c78	206	dev_err(da9063->dev, "Cannot read chip variant id.\n");
8e685483 KG	207	return -EIO;
8e685483 KG	208	}
c1d12c78 OST	209
	210	variant_code = variant_id >> DA9063_CHIP_VARIANT_SHIFT;
	211
	212	dev_info(da9063->dev,
	213	"Device detected (chip-ID: 0x%02X, var-ID: 0x%02X)\n",
	214	model, variant_id);
	215
9cb42e2a OST	216	if (variant_code < PMIC_DA9063_BB && variant_code != PMIC_DA9063_AD) {
	217	dev_err(da9063->dev,
	218	"Cannot support variant code: 0x%02X\n", variant_code);
8e685483 KG	219	return -ENODEV;
	220	}
	221
c1d12c78	222	da9063->variant_code = variant_code;
8e685483	223
a0e08b86 KG	224	ret = da9063_irq_init(da9063);
	225	if (ret) {
	226	dev_err(da9063->dev, "Cannot initialize interrupts.\n");
	227	return ret;
	228	}
	229
439b8bdd DL	230	da9063->irq_base = regmap_irq_chip_get_base(da9063->regmap_irq);
439b8bdd DL	231
152bed76	232	ret = devm_mfd_add_devices(da9063->dev, PLATFORM_DEVID_NONE,
c2ffec5e MV	233	da9063_common_devs,
c2ffec5e MV	234	ARRAY_SIZE(da9063_common_devs),
152bed76	235	NULL, da9063->irq_base, NULL);
c2ffec5e MV	236	if (ret) {
	237	dev_err(da9063->dev, "Failed to add child devices\n");
	238	return ret;
	239	}
	240
	241	if (da9063->type == PMIC_TYPE_DA9063) {
	242	ret = devm_mfd_add_devices(da9063->dev, PLATFORM_DEVID_NONE,
	243	da9063_devs, ARRAY_SIZE(da9063_devs),
	244	NULL, da9063->irq_base, NULL);
	245	if (ret) {
	246	dev_err(da9063->dev, "Failed to add child devices\n");
	247	return ret;
	248	}
	249	}
8e685483 KG	250
	251	return ret;
	252	}
	253
8e685483	254	MODULE_DESCRIPTION("PMIC driver for Dialog DA9063");
37778d83 ST	255	MODULE_AUTHOR("Krystian Garbaciak");
37778d83 ST	256	MODULE_AUTHOR("Michal Hajduk");
8e685483	257	MODULE_LICENSE("GPL");